Tropical Fish Keeping - Aquarium fish care and resources

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Blaxicanlatino 01-16-2009 11:37 AM

co2 cons and pros
Should I use co2 in my aquarium? is it neccessary? Whats so good about having it and what is bad about it? Is there a cheap method of adding co2 to my tank? any suggestions? thank you :)

Blaxicanlatino 01-16-2009 12:33 PM

Does in lower pH?

Mikaila31 01-16-2009 03:51 PM

CO2 increases plant growth it does lower CO2. The cheapest way to add CO2 is using a yeast mixture.

Blaxicanlatino 01-16-2009 07:12 PM

Co2 increases plant growth it does lower co2? what? lol do you mean lower pH? does it lower quickly or is it just a gradual change? Will it endager my fish if theres theres to much co2?

Blaxicanlatino 01-16-2009 07:35 PM

i do i check how much ppm of co2 is in the tank? whats a good amount of co2? what too much?

Mikaila31 01-16-2009 07:44 PM

LOL! :oops: Yeah I meant PH! Yeah it lowers it pretty slowly. If you are using a DIY yeast setup it shouldn't matter, There is very little risk of overdose co2 using this kinda setup.You can overdose using pressurized co2. I've done it before and it's not good. I killed a very large colony of cherry shrimp and came close to killing the fish in that tank:-(. Though that was my fault, it should not of happened.

In regards to the PH thing, I wouldn't worry about it. My tap water is 7.6 and the tanks w/ co2 run at about 6.8. I still run pressurised co2 and it gets turned off at night, I don't know how much the PH "swings" at night. But cherry shrimp, rainbows, and gouramis have all been bred in that tank, so it doesn't seem to bother the fish. Keep in mind in the wild PH can fluctuate quite a bit

The only time you should worry about ph dropping is if your water has very low buffering levels. I'm talking about KH, low KH levels and your ph can fluctuate widely. High KH levels and your PH won't move if you hit it with a brick.

Mikaila31 01-16-2009 07:50 PM


Originally Posted by Blaxicanlatino (Post 164225)
i do i check how much ppm of co2 is in the tank? whats a good amount of co2? what too much?

Get a drop checker off ebay. Here <------ This seller is really good, takes about 2 weeks to get it though. They will replace it no questions asked if anything is wrong with it.

You put a couple drops of the solution in the ball and add a little bit of tank water. The solution will be yellow if co2 is low, green if it is good, and blue if it is high.

Blaxicanlatino 01-16-2009 08:42 PM

im using a homemade co2 deal. HOw do i test KH? Whats a good Kh to have?

Mikaila31 01-16-2009 09:21 PM

The most accurate way would be to hunt down a KH test kit. Or you can just rely on the drop checker. KH and PH relate to each other which then relates to the amount of co2. Before drop checkers you had to measure PH and KH to figure out the PPM of CO2. Here is a chart, you shoot for about 20-30ppm. Though it wouldn't be super accurate if you knew your PH and your general CO2 level(low/good/hi) from the drop checker you could figure out your general KH using the chart.

Blaxicanlatino 01-17-2009 08:00 AM

I see. so i need to know my pH and my kH before i could know how much c02 is good. Is there a fert that gives off c02? of perhaps maybe if i half the ingredients in the DIY c02 generator to put a minimal amount of C02 in.

Does KH also have a relation to water hardness? my water is really hard

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